Guy, Who ever owned #972 before me did the B mods to the rig. It came to me equipped with the KSB2, KNB2 and K160RX. I'm going to build the KDSP2 to drop in later. I have the QRP top with a KAT2, KIO2 and KBT2 from K2 #5939 that I built a few years ago.
#5939 is decked out with the KPA100,KDSP2,KSB2,KNB2,K160RX and KAT100 and serves as a back up for my K3. This arrangement will give me a grab and K2 without having to change tops or even moving the K2 in the shack. I love the building process, but money is a little tight right now and this one came at the right price. Just made economic sense. The line up now included a K1, K2/10, K2/100 and a K3/100. All great rigs. Chuck K4QS -----Original Message----- From: Guy Olinger K2AV <[email protected]> To: [email protected] Cc: [email protected] Sent: Sun, Mar 14, 2010 5:42 pm Subject: Re: [Elecraft] K2 No Side Tone After Firmware Upgrade I added DSP to my bought-used K2 #1239 when I did all the A/B mod upgrades and replaced all the filter crystals, and it was stunning the difference it made. Once I got the crystal and DSP skirts aligned for each filter BW slot, it was dynamite, and frankly not so far off K3 performance. I have all the options and the battery top as well. You doing the A/B mods? 73, Guy. On Sun, Mar 14, 2010 at 4:09 PM, <[email protected]> wrote: > > > > Done, > > The sidetone is up and running. Now to recalibrate the VFO and check a few other things and I will start building the KDSP2. > > I have a QRP top with KAT2, KIO2 and KBT2 standing by. #972 will be a fully loaded and up to date K2/10 sitting in the line up with my K1, K2/100 and K3. > > Thanks again Don. > > Chuck K4QS > > > > > > > -----Original Message----- > From: Don Wilhelm <[email protected]> > To: [email protected] > Sent: Sun, Mar 14, 2010 4:42 pm > Subject: Re: [Elecraft] K2 No Side Tone After Firmware Upgrade > > > Chuck, > > While both sidetone sources should be supported in 2.04P, go ahead and > make the change anyway. Yes, make the cut on the trace ging between > U6-25 and Q5. You will add 2 wires. The one from U8-4 to Q5 (make > certain you do not put it on the R-PAK) is the one important for the > sidetone. The long wire from U6 pin 25 and the capacitor is only used > for data communications, and will not be used unless you have either the > KIO2 or the KPA100, but add it anyway just for completeness. > > After you make the change, the sidetone source will be only U8-4. If > you added the inductor and the resistor for the sidetone waveshape > during the upgrade, check those components (and the trace cut) carefully > if the sidetone still does not work. > > 73, > Don W3FPR > > [email protected] wrote: >> Hi Don, >> >> This is K2 sn972 I'm upgrading, so it's an oldy. The firmware chip is 2.04P > which I somehow came into possession of while building my first K2 sn5939 a few > years ago. I had Elecraft send only the new I/O chip, so the firmware came to > me in pieces. I didn't see any notes about circuit modifications in the > firmware documentation that I have. >> >> I do have the mods located on page 10 of the KIO2 manual. Just to verify, > when you say deletion, are you referring to the cut trace between U6-25 and Q5? > >> >> I own a .001uf cap, some hookup wire and an Exacto knife, so I should be able > to knock this out in a few minutes. >> >> Thanks for pointing me in the right place. >> >> Chuck K4QS >> >> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
